Most recommendations for fixing this problem involve installing some of kind of third-party extension which invariably requires permission to Access your data for all websites. Some of these at least are vetted by Mozilla (e.g. UBlock Origin) while s...
I too used to think I needed this, but I'd say pretty much everything that can be achieved by implementing such a feature in Firefox on MacOS already can be achieved in Firefox by using the native MacOS Screen Mirroring feature in Extended Display mo...
